Motherboards are a personal choice - their looks, and the set of features you want or need from one.
Onboard audio - they're all using Realtek audio processors. Asus has that 'SupremeFX' advertised on some of their boards, but it's just Realtek; all they did was change the name... in the case of the 2 Asus boards and the Tomahawk, all 3 are using the ALC 4080 codec.
GPUs also have audio processing - may, or may not be on par with motherboard's though.
VRM: VRMs on many boards are overkill these days, and most folks appear to be going the way of applying negative Curve Optimizer offsets for their cpus instead of trying to overclock(technically, making adjustments in Curve Optimizer is overclocking too). The goal? Lowering temperatures while trying to sustain the cpu's original performance(and maybe a little extra).
Software's hit or miss. Some is handy and works properly, some of it is bloat, and some of the misses are due to being broken by Windows...
And also they are on the same price in my country so which one should I choose
The one you think looks the best. But, if you've taken the time to look through the product pages for both boards, figured out what features you want, what's extra baggage... then pick the one that checks the most boxes.